Miller faces four-game suspension if appeal falls through

Von Miller, the Denver Broncos’ All-Pro linebacker, faces a four-game suspension for a still-unspecified violation of NFL policy. But the NFL Players Association is leading an appeal of the suspension, and Miller's status for the start of the regular season remains up in the air.

ESPN first reported the pending violation Monday morning, and the Denver Post later reported that Miller has been in the league testing program since a positive test for amphetamines and marijuana in his rookie year of 2011.

Von Miller had 18.5 sacks last season for the Broncos. He is the anchor of the team's 4-3 defense. (AP Photo)

In a pair of tweets Monday afternoon, NFLPA spokesman George Atallah said, “The NFLPA is working closely with (Miller) to appeal his suspension. We are all very disappointed that confidentiality was breached. I can also confirm that Von’s case does not involve the Steroids and Related Substances Policy.’’

Miller himself had tweeted earlier Monday, “Seeing reports abt 4 game susp. I know I did nothing wrong. I'm sure this'll be resolved fairly. Disapp. Broncos have 2 open camp like this."

The Broncos open camp on Wednesday. Their regular-season opener is a nationally-televised playoff rematch with the Super Bowl champion Baltimore Ravens in Denver on Thursday night September 5.

Miller, the second pick in the 2011 draft, has 30 sacks and forced nine fumbles in his first two seasons, and the Broncos reached the playoffs in each season.

Brandon Krisztal, a reporter for Denver radio station KKFN-FM 104.3, told ESPN’s SportsCenter Monday morning—and later posted on his Twitter account—that he had been told that Miller had tested positive for two recreational drugs.